桥架比重表 规格(M)400*200300*200250*150200*100150*75板厚1.2mm86.67153672.69225658.71297644.73369634.249236板厚1.5mm108.3394290.8653273.3912255.9171242.811545板厚2mm 144.45256121.1537697.8549674.5561657.08206板厚2.5mm180.5657151.4422122.318793.195271.352575板厚3mm216.67884181.73064146.78244111.8342485.62309